Персона:
Котковский, Геннадий Евгеньевич

Организационные подразделения

Организационная единица

Институт нанотехнологий в электронике, спинтронике и фотонике

Институт ИНТЭЛ занимается научной деятельностью и подготовкой специалистов в области исследования физических принципов, проектирования и разработки технологий создания компонентной базы электроники гражданского и специального назначения, а также построения современных приборов на её основе. Наша основная цель – это создание и развитие научно-образовательного центра мирового уровня в области наноструктурных материалов и устройств электроники, спинтроники, фотоники, а также создание эффективной инновационной среды в области СВЧ-электронной и радиационно-стойкой компонентной базы, источников ТГц излучения, ионно-кластерных технологий материалов.

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Котковский

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Геннадий Евгеньевич

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Теперь показываю 1 - 10 из 22

Только метаданные
Photon counting mode for advanced real-time detection of bioaerosols
(2021) Tkachuk, A. P.; Verdiev, B. I.; Alatirev, A. G.; Akmalov, A. E.; Chistyakov, A. A.; Kotkovskii, G. E.; Kuzishchin, Y. A.; Martynov, I. L.; Osipov, E. V.; Pashkevich, A. A.; Акмалов, Артём Эдуардович; Чистяков, Александр Александрович; Котковский, Геннадий Евгеньевич; Кузищин, Юрий Александрович; Мартынов, Игорь Леонидович; Осипов, Евгений Валерьевич; Пашкевич, Александра Андреевна
© 2021 SPIECurrently, one of the most important application of flow cytometry is the real-time analysis of aerosols, in particular, to ensure biosafety. In most cases, such analysis is aimed at detecting fluorescent signals from aerosol particles corresponding to the light emission of tryptophan and nicotinamide adenine dinucleotide (NADH). Further development of the method is largely related to the improvement of the light detecting systems for recording and processing of fluorescence and scattered light signals. In this work, a comparative analysis of flow cytometers for bioaerosols detection based on photo-multiplier tubes (PMT) and avalanche photodiodes (APD) operating in analog and photon-counting modes was carried out. The limit of detection (LOD) of bioaerosols, response time and ability to detect particles with low scattering and fluorescence cross section were calculated and examined. The calculations were carried out for the well-known optical scheme of fluorescence detection based on discrete photodetectors and dichroic mirrors combined with an air flow chamber equipped with elliptical and spherical mirrors. An ultraviolet light emission diode (LED) was used as a model source of exciting radiation. To estimate the optical properties of aerosol particles, experimental results obtained for a model bovine serum albumin bioaerosol and published data on various other bioaerosols were used. The calculation of the total number of fluorescent photons, emitted by particles of various sizes while passing the flow chamber was carried out. The obtained data were compared with parameters of photodetectors operating in analog and photon-counting modes. The critical particle size was determined for the effective registration in a photon-counting mode. Considering the size distribution of aerosol particles, it was concluded that application of the photon-counting mode will reduce the LOD of bioaerosols by more than an order of magnitude.
Только метаданные
Preconcentration of vapors of low-volatile explosives for ion mobility spectrometry
(2021) Akmalov, A. E.; Chistyakov, A. A.; Kotkovskii, G. E.; Kostarev, V. A.; Lavrinenko, K. N.; Акмалов, Артём Эдуардович; Чистяков, Александр Александрович; Котковский, Геннадий Евгеньевич; Костарев, Виталий Алексеевич; Лавриненко, Кирилл Николаевич
© 2021 SPIEThe issue of civil security and prevention of terrorist attacks in public places is becoming more and more actual every year. In this regard, increased attention is paid to detection of explosives. Of particular interest are methods to detect trinitrotoluene (TNT), hexogen (RDX), penthrite (PETN), octogen (HMX). Recently, gas-analytical, nuclear-physical, electromagnetic, terahertz, and biological detection methods have been developed. The lowest detection limit was achieved using gas-analytical methods, namely the non-linear ion mobility spectrometry method, with a limit of detection of 5.10-15 g/cm3. However, the question of feasibility of using these methods in real conditions is increasingly raised. There is an opinion that it is much more effective to detect explosives by traces than by vapor. In this work we investigated the possibility of detecting vapors of pure explosives with low saturated pressure of vapors. By the example of pure and faсtory hexogen, using the method of thermal-programmed desorption and mass spectrometry, it was shown that it is hexogen vapor, and not technological impurities or additives with saturated vapor pressure exceeding the saturated vapor pressure of hexogen, that are registered in the gas phase by ion mobility spectrometry. A technique was developed and proposed to concentrate RDX vapors. Using temperature-programmed desorption, the minimal time of concentration and surface fill factor were determined.
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RADIOVISION IN THE TERAHERTZ RANGE: PROBLEMS AND PROSPECTS
(НИЯУ МИФИ, 2023) Chistyakov, A. A.; Akmalov, A. E.; Kotkovskii, G. E.; Kozlovskii, K. I.; Maksimov, E. M.; Martynov, I. L.; Osipov, E. V.; Kuzishchin, Yu. A.; Plekhanov, A. A.; Осипов, Евгений Валерьевич; Козловский, Константин Иванович; Котковский, Геннадий Евгеньевич; Мартынов, Игорь Леонидович; Максимов, Евгений Михайлович; Чистяков, Александр Александрович; Акмалов, Артём Эдуардович
An analysis of the current state of research and development in the fi eld of radiovision for the terahertz range of electromagnetic radiation was carried out in the work. Various sources of terahertz radiation are considered: photoconductive antennas, IMPATT diodes, Schottky diodes, and others, as well as modern video cameras for this range and their main characteristics for recording and studying THz images in various spectral regions. The results of studies of the intensity distribution in THz radiation beams at diff erent wavelengths for photoconductive antennas using THz radiovision, as well as the possibilities of studying scattering processes during refl ection and transmission of THz radiation for various materials, are presented.
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Enhancement of characteristics of field asymmetric ion mobility spectrometer with laser ionization for detection of explosives in vapor phase
(2020) Kostarev, V. A.; Kotkovskii, G. E.; Chistyakov, A. A.; Akmalov, A. E.; Костарев, Виталий Алексеевич; Котковский, Геннадий Евгеньевич; Чистяков, Александр Александрович; Акмалов, Артём Эдуардович
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.Ion mobility spectrometry instrumentation today is widespread in the area of transport security and counterterrorism. This method of detection of explosive substances is highly appreciated for the existence of portable detectors capable of detecting concentrations of 10−13 –10−14 g/cm3 at atmospheric pressure using traditional ionization methods including corona discharge and beta radiation. However, low vapor pressure of some explosives imposes requirements on limit of detection (LOD) down to 10−15 –10−16 g/cm3 . In this paper we compare a radioactive63 Ni ionization source with a laser ionization source and reveal the parameters of laser ionization of a group of explosives, namely trinitrotoluene (TNT), cyclotrimethylene-trinitramine (RDX), cyclotetramethylene-tetranitramine (HMX) and pentaerythritol tetranitrate (PETN), which can reduce the limit of detection of portable devices. A laser ionization source can provide a higher signal to noise ratio than radioactive63 Ni at optimal intensity of laser radiation for PETN and HMX of 3 × 107 W/cm2 and 2.5 × 107 W/cm2, respectively. Limits of detection were estimated: 3 × 10−15 g/cm3 for RDX, 8 × 10−15 g/cm3 for PETN and less than 3 × 10−15 g/cm3 for HMX. These results are promising to further improve the capabilities of detectors of low volatility explosives without sacrificing portability, light weight and reasonable cost of the laser source.
Только метаданные
About impurities in cyclotrhylmethylentrinitramine and the possibility of detecting its vapor
(2020) Akmalov, A. E.; Chistyakov, A. A.; Kotkovskii, G. E.; Kostarev, V. A.; Kulintsov, A. V.; Lavrinenko, K. N.; Акмалов, Артём Эдуардович; Чистяков, Александр Александрович; Котковский, Геннадий Евгеньевич; Костарев, Виталий Алексеевич; Лавриненко, Кирилл Николаевич
© 2020 SPIECyclotrhylmethylentrinitramine (RDX) is one of the most dangerous explosive substances. The presence of impurities in this explosive may be important for its determination as residual traces at the scene of incidents, as well as in the quick analysis of passengers and luggage by ion mobility spectrometers. In the work industrially manufactured RDX samples, that were not undergone any purification, were investigated by gas chromatography-mass spectrometry method. The attention was paid to search precursors and possible technological admixtures. On the basis of received chromatograms and mass spectra it was established the presence in the analyzed RDX samples of urotropin, acetic anhydride, acetic acid, triazine and octogen. The mass content of the substances was estimated. Special attention was paid to the products of RDX biodegradation, which can occur both in aerobic and anaerobic environments during its storage. The quantitative content of RDX biodegradation products in samples under study was estimated. Sorption of chemically pure and industrially manufactured RDX vapors on a concentrator from metal meshes were carried out. By the method of thermodesorption mass spectrometry the composition and differences of the concentrated samples were analyzed. Recommendations for taking into account the results obtained when working with vapors and traces of RDX by ion mobility spectrometers were given.
Только метаданные
Portable aerosol collector with liquid circulation mounted on a drone
(2020) Akmalov, A. E.; Belenok, S. K.; Kadyrova, A.; Kirillova, V.; Kostarev, V. A.; Kotkovskii, G. E.; Chistyakov, A. A.; Акмалов, Артём Эдуардович; Беленок, Сергей Константинович; Кириллова, Вероника Олеговна; Костарев, Виталий Алексеевич; Котковский, Геннадий Евгеньевич; Чистяков, Александр Александрович
© 2020 SPIEEarly detection of pathogens is crucial for ensuring safe living conditions. Conventional sampling methods do not ensure the sustainability of captured microorganisms. Cyclone-based liquid absorptive samplers are the most promising devices in this regard. Most samplers have limited application scope as they are intended for laboratories. In the study we developed a special liquid-based sampler for mounting on a drone. A structure and base values of a cyclone collector were determined. The chosen design provides maximum particle capturing efficiency in terms of low air flow rate and small size of the collector. Projected capturing efficiency for particles of the size of 1mсm is approximately 20%, for particles of the size bigger than 2,5mсm is 100%. Mathematical modeling proved the correctness of theoretical considerations. This made it possible to design and fabricate a prototype of a sampler device which also includes a fan, a peristaltic pump, valves, a sensor for liquid levels monitoring, a display for operation mode controlling. Outdoor sampling on a drone has successfully proved performance efficiency at close to zero temperatures. A study on capturing efficiency was carried out by sampling sucrose aerosol with a fluorescein dye in a microbiological safety box. Specific efficiency of our sampler is 1,18 [relative units/(litre/min)], which is over twice s.e. of 0,43 [r.u./(l/min)] of existing laboratory devices. The device provides for the issuance of collected samples on standard immunochemical test strips for the analysis of adenovirus, rotavirus, influenza and other respiratory diseases with a full analysis time of 10 minutes.
Только метаданные
THz imaging with spectral resolution for identification of traces of explosives
(2020) Akmalov, A. E.; Kotkovskii, G. E.; Kozlovskii, K. I.; Maksimov, E. M.; Plekhanov, A. A.; Chistyakov, A. A.; Акмалов, Артём Эдуардович; Котковский, Геннадий Евгеньевич; Козловский, Константин Иванович; Максимов, Евгений Михайлович; Плеханов, Андрей Александрович; Чистяков, Александр Александрович
© 2020 SPIEThe presence of characteristic peaks in the terahertz (THz) absorption spectra of many organic substances and the active development of the technology for manufacturing video cameras based on microbolometric matrices create an increased interest in methods for identifying explosive compounds using THz imaging with simultaneous recording of spectral information. The results of relevant studies can be used in the development of security systems. THz images (taking into account the spectral information in each pixel) were obtained in this work by passing radiation through a sample based on hexogen (RDX) microcrystals deposited on a polyethylene (PE) film. A photoconductive antenna was used as a source of broadband radiation in the range from 0.5 THz to 2.5 THz. Spectral resolution was provided using a Fourier spectrometer based on a Michelson interferometer. The images were recorded using a THz video camera based on a microbolometric matrix. The possibility of identifying RDX microcrystals using color visualization of spectral information in the frequency range of one of the characteristic RDX peaks (~0.8 THz) has been demonstrated.
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СПОСОБ РЕГИСТРАЦИИ СИГНАЛОВ ЛЮМИНЕСЦЕНЦИИ И РАССЕЯНИЯ ОТ АЭРОЗОЛЬНЫХ ЧАСТИЦ ПРИ ИХ ВОЗБУЖДЕНИИ В СТРУЕ И СИСТЕМА ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ
(2023) Котковский, Г. Е.; Чистяков, А. А.; Мартынов, И. Л.; Кузищин, Ю. А.; Акмалов, А. Э.; Осипов, Е. В.; Осипов, Евгений Валерьевич; Кузищин, Юрий Александрович; Мартынов, Игорь Леонидович; Котковский, Геннадий Евгеньевич; Чистяков, Александр Александрович; Акмалов, Артём Эдуардович
Настоящее изобретение относится к области контрольно-измерительной техники и касается способа регистрации сигналов люминесценции и рассеяния от аэрозольных частиц при их возбуждении в струе. Способ включает засвечивание возбуждающим лучом воздушного потока струи с аэрозолем, сбор и разделение на, по меньшей мере, три канала оптических сигналов рассеяния и люминесценции в блоке спектрального разделения и направление сигналов на приемники оптического излучения. При этом ось сбора оптических сигналов рассеяния и люминесценции перпендикулярна оси возбуждающего луча. При осуществлении способа производят формирование воздушного потока струи аэрозоля в анализируемом объеме проточно-оптической камеры, в которую воздушные потоки поступают из побудителя расхода воздуха. Скорость, оптимальную для пролёта в анализируемом объёме аэрозольных частиц определённых размеров, определяют в электронном блоке управления на основании данных, поступающих с приемников оптического излучения. Технический результат заключается в повышении чувствительности и обеспечении возможности детектирования аэрозольных частиц малого сечения. 2 н. и 9 з.п. ф-лы, 1 ил.
Только метаданные
Spectral identification of traces of explosives in reflected terahertz radiation
(2019) Akmalov, A. E.; Aksenov, E. A.; Kotkovskii, G. E.; Kozlovskii, K. I.; Maksimov, E. M.; Plekhanov, A. A.; Chistyakov, A. A.; Акмалов, Артём Эдуардович; Котковский, Геннадий Евгеньевич; Козловский, Константин Иванович; Максимов, Евгений Михайлович; Плеханов, Андрей Александрович; Чистяков, Александр Александрович
© 2019 SPIE.The work is devoted to the influence of scattering of terahertz (THz) radiation by hexogen particles (RDX) in powdery samples on their transmission and reflection spectra. A terahertz radio-vision installation with spectral resolution was used to determine experimentally THz spectra of RDX. For samples with small RDX particles (the typical particle size is 100 μm), characteristic peaks at 0.8 THz and 1.06 THz are observed in absorption spectra despite scattering, that can be used to identify this substance. For large hexogen particles (a typical particle size is 450 μm), experiments and numerical simulation showed that even the most intense peak at 0.8 THz is not observed in absorption spectra, and the spectra are mainly due to the scattering effect and its depending on the wavelength of radiation. The reflection spectra of RDX layers (particle size is about 100 μm) qualitatively differ from the reflection spectra of RDX crystals and are formed as a result of absorption during propagation of THz radiation in the particle layer. Thus, the substance can be identified by absorption spectra in a reflection scheme.
Только метаданные
Detection of vapors of explosives by field asymmetric ion mobility spectrometry method with laser ionization
(2019) Akmalov, A. E.; Chistyakov, A. A.; Kotkovskii, G. E.; Kostarev, V. A.; Акмалов, Артём Эдуардович; Чистяков, Александр Александрович; Котковский, Геннадий Евгеньевич; Костарев, Виталий Алексеевич
© 2019 SPIE.The features of laser ionization of trinitrotoluene and hexogen at registration of ionization products by field asymmetric ion mobility spectrometer were investigated in this paper. The optimal range of intensity to obtain the maximum ion current was determined, and it was shown that composition of ions of explosives is changed with the change of intensity. The values of intensity and radiation at which it is possible to obtain spectra of nonlinear ion mobility with different composition of RDX and TNT ions were determined, which is promising for increasing the selectivity of registration. It was shown that ion peaks of TNT and RDX at laser ionization are characterized by low nonlinear mobility coefficients in comparison with a radioactive source based on Ni63, which indicates a more selective mechanism of laser ionization of these explosives at atmospheric pressure.